Zilog Z80
From Computer History Wiki
The Z80 was a CPU from Zilog that was compatible with the intel 8080. It was manufactured from 1976. Variants of the Z80 are still produced to this day (2012) by Zilog. The instruction set is a superset of the 8080 instruction set, but the Z80 assembler syntax is different from the Intel 8080 assembler syntax.